2253.Thesesections extend the time limit for assessments giving effect to the provisions of Chapters 2 to 6 of this Part of the Act, enable officers of Revenue and Customs to obtain information about the ownership of shares, stock and securities for the purposes of this Part, and define “company with investment business” and “relevant non-trading debit”. They are based on sections 767B and 768 to 768E of,and paragraphs 11 and 12 of Schedule 28A to, ICTA.